摘要
基于2001~2018年乌鲁木齐市空气质量监测数据及2014~2018年各监测站点的数据,采用主成分分析法、BFAST趋势分析法、及反距离权重插值法对乌鲁木齐市空气质量进行时空分析。结果表明:乌鲁木齐市空气质量在2012年前呈升高降低交替的趋势,2012年煤改气后呈急速下降的趋势;污染物以PM_(2.5),SO_(2),CO为主,方差累计贡献率达到85.37%;由BFAST对AQI时间序列进行分解与识别发现,周期为1年且AQI呈现两头高中间低的双峰型特征,6~8月为U型谷底,趋势上呈现逐年递减的趋势。由空气质量空间分布得出AQI高值区仍然聚集在新疆农科院农场和米东区环保局,低值区则集中在收费所与监测站且由北向南呈逐渐递减的趋势;变化速率最快的为铁路局,改善最好的是米东区环保局,空间插值与主成分分析结果一致。
Based on the air quality monitoring data from 2001 to 2018,and the monitoring data of other station from 2014 to 2018 in Urumqi,the air quality of Urumqi in recent 20 years were analyzed by using the Principal Components Analysis(PCA),the Breaks for Additive Season and Trend(BFAST)and the Inverse Distance Weight(IDW)methods.The results showed that the air quality of Urumqi city had showed an alternating trend of increase and decrease before from 2001 to 2012,and a rapid decline trend after the Coal to Gas Project in 2012.The main pollutants were PM_(2.5),SO_(2) and CO,its cumulative contribution rate was 85.37%.Based on the decomposition and identification of the AQI time series by BFAST,it was found that the AQI presents a one⁃year period was,a bimodal feature withhigh at both ends and low in middle,a U⁃shaped bottom from June to August,and decreases year by year.Spatial distribution of AQI showed that the high value was concentrated in the area of Xinjiang Academy of Agricultural Sciences Farm and the Midong District Environmental Protection Bureau,while the bottom value was concentrated in the area of the Toll station and Environmental Monitoring station,and decreases from North to South gradually.The Railway Bureau area had the fastest change rate,the best improvement was the Midong District Environmental Protection Bureau.The results of IDW analysis were consistent with the PCA.
作者
藏晓芳
邓文叶
帕丽达·牙合甫
古丽·加帕尔
宋思醒
白雪莲
ZANG Xiaofang;DENG Wenye;Palida YAHEFU;Guli GIAPAER;SONG Sixing;BAI Xuelian(Xinjiang Academy of Environmental Protection Science,Xinjiang Urumqi 830011 China;Xinjiang Key Laboratory for Environmental Pollution Monitoring and Risk Warning,Xinjiang Urumqi 830011 China;Xinjiang Engineering Technology Research Center for Cleaner Production,Xinjiang Urumqi 830011 China;College of Grass and Environmental Science,Xinjiang Agricultural University,Xinjiang Urumqi 830052 Chian;State Key Laboratory of Desert and Oasis,Institute of Ecology and Geography,Chinese Academy of Sciences,Xinjiang Urumqi 830011 China;不详)
出处
《新疆环境保护》
2021年第2期22-29,共8页
Environmental Protection of Xinjiang
基金
国家重点研发计划项目(2018YFC0213700)
新疆“天山青年计划”项目(2017Q062)
国家自然科学基金项目(21167017,21567028)。
